Roll lift devices for ironing machines and the like



Dec. 30, 1958 5. I. FREDHOLM 2,866,282

ROLL LIFT DEVICES FOR momma MACHINES AND THE LIKE Filed July 2a, 1955 2 Sheets-Sheet 1 FIG 3 Even-601 G wzfvedhozzv Dec. 30, 1958 e. I. FREDHOLM 2,866,282

ROLL LIFT DEVICES FOR IRONING MACHINES AND- THE LIKE Filed July 26. 1955 2 Sheets-Sheet 2 Z. r2,u enter G I. FredZz/o 5112/ United States Patent ROLL LIFT DEVICES FOR IRONING MACHINES AND THE LIKE Guunar Ivar Fredholm, Bromma, Sweden Application July 26, 1955, Serial No. 524,408

3 Claims. (Cl. 3859) This invention relates to flat work ironers and particularly to means for lifting the roll out of engagement with the chest.

An object of the invention is to provide a simple and reliable lifting device for a single roll which device in the simplest manner can be arranged to drive the lifting mechanism of the succeeding rolls in ironing machines with two or more rolls.

A further object of the invention is to provide a device for automatically stopping the movement of the lifting members in desired positions.

The invention will be described more fully with reference to the accompanying drawings in which:

Fig. l is a front elevation of an ironing machine.

Fig. 2 is a central longitudinal sectional view of the driving members for the roll on enlarged scale.

Fig. 3 is an elevational view, partly in cross section of the components of the lifting assembly, and

Fig. 4 is a view generally similar to Fig. 3 illustrating a lifting assembly for use with two rolls.

The machine is provided with an ironing roll 1 of conventional design which is rotatable in a chest 2 which serves as bearing member for the roll. The chest is mounted between two stands 3 and 4 and the stand 4 carries the driving means for the roll 1. The roll 1 is provided at its respective ends with hub sleeves 5 and 6 which are freely movable in relation to the stands 3 and 4 respectively. As best shown in Fig. 2, the power for rotating the roll 1 is transmitted by a cardan shaft 7 and the respective ends of the shaft 7 carry pivot elements 8 and 9. The pivot element 8 is connected with the hub sleeve 6 and the pivot element 9 connected with a hub sleeve 10 of a driving wheel 11. Beneath each of the hub sleeves 5 and 6 a roll hooking member 12 is swingably mounted on a pin 13 and is connected with an actuating lever 14. The lever is at its outer end connected with an articulated rod 15, the lower end of which is connected with a crank pin 16 of a wheel 17 which latter wheel is driven by means of a Worm gear 18.

In order to raise two or more rolls in a machine simullever 20 projects downwardly from the booking member 2,866,282 Patented Dec. 30, 1958 12 which lever by means of a pin 21 is pivotally connected to a rod 22. This rod is joined with a lever 23 arranged in the same manner as the lever 20 and projecting downwards from a hooking member 24 arranged to lift the succeeding roll in the machine.

When the wheel 17 rotates, the rod 15 will be lifted and lowered slowly. Simultaneously the roll 1 is lowered and lifted and the circuit for the driving motor may be broken when the roll assumes the desired position.

However, such an operation can be performed automatically by means of a cam disk arranged on the Wheel 17 and provided with a pair of oppositely arranged earns 25 and 26 which are adapted to open a switch 27 in the motor circuit at the moment the crank pin 16 attains its lowest and highest position. The switch 27 is arranged to be short-circuited by means of a starting switch 28 provided on the operating disk of the machine. Thus the motor can be started again for lifting and lowering the rolls. The last named movement is continued until the crank pin 16 arrives at its highest position in which the hooking members 12, 24 disengage the hub sleeves of the rolls.

What I claim is:

1. In a laundry ironing machine, an ironing bed, an ironing roll resting upon and rotatably supported by said bed, a hub portion at each end of said roll, means for rotating said roll comprising a cardan shaft connected to one of said hub portions, pivoted hook-like members at opposite ends of said roll adapted for cooperation with said hub portions and mounted for movement from a lowered position out of engagement with said hub portion into a raised position in engagement with said hub portions and in which latter position said roll is raised out of contact with said bed and rests upon said hooklike members, and eccentric means operatively connected to said hook-like members for rocking the same.

2. An ironing machine as defined in claim 1 including a cam disc having a pair of diametrically opposed cam surfaces thereon, a motor driving the eccentric means and the cam disc, an electric circuit for the motor, a switch in the 'motor circuit actuated by the cam disc, and a second switch connected in parallel with the first named switch.

3. An ironing machine as defined in claim 1 wherein the operative connection between the eccentric means and the hook-like members includes a rod connected to the eccentric means and a pivotal connection between the rod and the hook-like members.

References Cited in the file of this patent UNITED STATES PATENTS 2,657,483 Zwaard Nov. 3, 1953 2,694,268 Dornbusch Nov. 16, 1954 FOREIGN PATENTS 446,507 Great Britain Apr. 27, 1936 

